Add gitignore

Running `Pkg.test` was causing the repo to become dirty since
it appears to edit the Project.toml when running and change
stanza ordering. Manifest wasn't in gitignore so that's added too.

Author: MichaelHatherly

.gitignore

@@ -2,3 +2,4 @@
 *.jl.*.cov
 *.jl.mem
 .DS_Store
+/Manifest.toml

Project.toml

@@ -3,8 +3,8 @@ uuid = "47d2ed2b-36de-50cf-bf87-49c2cf4b8b91"
 author = ["Yuri Vishnevsky <[email protected]>"]
 version = "0.0.4"
 
-[compat]
-julia = "1"
-
 [deps]
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
+
+[compat]
+julia = "1"